Drilling apparatus



June 30, 1931. H. c, JOHAN$EN\ 1#811,939

DRILLING APPARATUS Filed Feb. 16, 1927 2 Sheets-Sheet 1- Inven 207": 4;;131 07719 6f :Iohawflenk Patented June 30, 1931 UNITED STATES PATENToFFicE HARRY C. JOHANSE-N, OF MICHIGAN CITY, INDIANA, ASSIGIN'OR TOSULLIVAN MA CHINERY COMPANY, A CORPORATION OF MASSACHUSETTS DRILLINGAPPARATUS Application filed February 16, 1927. Serial No. 168,864.

This invention pertains to rotary drilling apparatus and moreparticularly to an improved grief stem chuck for such apparatus.-

shown for purposes of illustration one form which the invention mayassume in prac.- tice.

In these drawings,

Fig. 1 is a front elevational view of a core drilling apparatus to whichthe-improved grief st-em chuck is applied, parts being shown in sectionto illustrate details of construction.

Fig. 2 is an enlarged detail sectional view of the improved grief stemchuck, the view being taken on line 22 of Figs. 4 and 6.

Fig. 3 is is a view similar to Fig. 2 and illustrating the chuck jaws intheir outer or released position.

Fig. 4 is a transverse horizontal sectional view taken substantially online H of as Fig. 2.

Fig.- 5 is a transverse horizontal sectional view taken substantially online 5-5 of Fig. 2.

Fig. 6 is a transverse horizontal sectional view taken on line 66 ofFig. 2.

In this illustrative construction there is shown arotary core drillingapparatus generally designated 1 and generally comprising a basestructure 2 on which is mounted an engine 3 a feeding mechanism 4 and ahoisting mechanism 5, the latter being located immediate to the feedingmechanism and in the rear of the latter. The base 2 is slidably mountedin a usual manner on parallel guideways 6 to enable the drillingapparatus to be moved bodily away from the drill hole during hoistingand lowering of the drill rods. The engine 3 is of the well known steamdriven type'and drives through suitable connections (not shown) thehoisting mechanism 5, and also is adapted to rotate the drill rods.

As shown, the feeding mechanism 4 comprises a vertical cylinder 8suitably supported on the base frame and in which a piston 9 isreciprocably mounted. Pressure fluid, herein water underpressure, isadapted to be conducted to the ends of the cylinder 8-above and belowthe piston 9 through suitable pipe connections 10 under the control of amanually operable valve 11, in a well known manner. Rigidly secured tothe piston 9 is a hollow rod 12 which eX- tends downwardly through astufiing box 13 carried by the lower cylinder head and upwardly througha stuffing box lt-carried by the upper cylinder head. This hollow rodcarries at its upper end a thrust head 15 of usual construction andwhich carries ball thrust bearings 16. these bearings is a thrustplatel? rigidly secured to a hollow drill rod 18, this rod beingof'hexagonal cross section at its lower end as at 19 and extends througha correspondingly shaped opening in a rotating 30 member20 of the drillrod rotation mechanism. The member 20 has keyed thereto at its upper'endat 21 a bevel gear 22 which is driven'by a bevel gear 23 suitably con'nectedto the drivin en ine 3., As clearl shownin Fig. lthe rotatingmember 20 is journaled in a suitable bearing 2% carried by thesupporting frame for the feeding mechanism. Carried at the lower end ofthe drillrod 18 is the improved automatic 9O grief stem chuck generallydesignated 25 which will later be described, the latter cooperating witha drill or grief stem 26 by which the usual rod line is carried. The

grief stem 26 carries at its upper end a 5 usual water swivel 27 andlifting bail 28. From the foregoing description it will be obvious thatthe drill rod may be raised and lowered through the rotating member 20while the same continuously rotates, and 3c Interposed betweenconsequently the drill rod is rotated as it is fed. It will also beobvious that the longitudinal thrust of the drill rod in eitherdirection will be absorbed by the ball bear ings 16 carried in thethrust head.

The improved automatic chuck as shown in the drawings specificallycomprises an upper part or body member 29 threadedly connected at 30 tothe lower end the drill rod 18 as clearly shown in Fig. 2. In accordance with this illustrative embodiment of the invention, interposedbetween the member 29 and a lower plate 31 are a plurality of distancepieces or key forming members 32, herein four, held in position by boltsengagingthe lower plate 31 and threadedly connected to the top member29. These distance pieces or keys are used as a part of the chuck bodyand also fit in grooves or flutes 34 formed in and extendinglongitudinally of the grief stem 26. Moreover, it will be noted thatthere is sufficient clearance between the parts and the grooves 34 topermit free longitudinal movement of the grief stem 26 1'elativethereto. From the foregoing it will be evident that the drill rod andthe members 29, 31 and 32 rotate together and due to the cooperation ofthe keys 32 with the longitudinal grooves 34 v in the grief stem thelatter also is rotated therewith. Again referring to Fig. 2 it will beobserved that the grief stem 26 hasformed thereon around itscircumference a series of grooves 35, herein three, and each series ofgrooves is spaced apart longitudinally of the grief stem a distance tocorrespond wlth the travel of feed of the feed piston 9. Disposed in thespace between the parts 32 of the chuck are jaws 36 and these jaws areslidably guided at their lower ends within radial grooves 37 formed inthe upper surface of the lower plate 31. The inner sides of these jawshave each formed thereon a series of teeth 38 which interengage with thecircumferentially extending grooves formed on the grief stem 26. Thesetoothed jaws are used when drilling with the hydraulic feed to hold theload or weight of the drill rods or may be disengaged from the griefstem when using the hoisting drum and cable as a feeding means for thebit. To operate these jaws 36 an adjusting ring 39 is provided whichfits around or surrounds the body of the chuck. As illus trated, thisadjusting ring has four rectangular recesses 40 within which the jaws 36project and the bottoms of these recesses are inclined as at 41 andcooperate with inclined or wedge shaped outer faces 42 of the jaws. Thejaws 36 have formed thereon at the sides thereof longitudinallyextending grooves 43 disposed parallel with the inclined faces 42 andwith these grooves interlocking portions or gibs 44 cooperate, theseinterlocking portions being formed on blocks or keys 45 disposed withinthe recesses 40 in the adjusting ring and are suitably rigidly securedto the latter. Formed on the upper part of the adjusting ring 39 areradially projecting flanges 46 which are interlocked with correspondingflanges 47 formed on a locking ring 48 having a grasping portion 49 andsurrounding the body of the chuck. The flanges 46 and 47 are maintainedin interlocking relation by means of a stop screw 50 threadedlyconnected to the locking ring 48 and projecting inwardly (see Fig. 6)within a cut away portion or slot 51 formed within one of the flanges46. The screw 50 and slot 51 permit limited rotation of the locking ring48 relative to the adjusting ring 39. The locking ring 48 also has aninwardly projecting flange 52 which overlies the upper surface of theadjusting ring 39 while formed in the inner edge of this flange 52' arenotches or recesses 53 which are adapted to receive the jaws 36 when thelatter are in their engaged position as will hereinafter be described.Referring to Figs. 2 and 3 it will be observed that the upper part 29 ofthe chuck body has threadedly connected thereto a radially disposedlocking pin or screw 54, while the locking ring 48 is cut away ornotched at to permit movement of the locking ring upwardly above thescrew 54, the screw passing through the slot 55 during such movement.Furthermore, the adjusting ring 39 is recessed at 56to receive the headof the screw 54 as shown in Fig. 3.

In the use of the improved grief stem chuck, when the operator graspsthe portion 49 of the locking ring 48 and lifts the latter upwardly, thegibs 44 move within the grooves 43 in the sides of the jaws,consequently causing the latter to' move outwardly from the positionshown in Fig. 2 to their released position shown in Fig. 3, therebyreleasing the locking engagement of the teeth on the jaws and thegrooves in the grief stem, respectively. As the adjusting ring is movedupwardly the screw 54 passes through the slot 55 in the locking ring andinto the recess. 56 in the adjusting ring and the locking ring is thenrotated, thereby causing the flange 52 to engage and overlie the uppersurface of the screw, thereby locking the jaws in their outer orreleased position as clearly shown in Fig. 3. \Vhen the locking ring 48isreleased and allowed to slide downwardly the tapered surfaces 41 and42 on the adjusting ring and jaws will cause the latter to be forcedinwardly and when the grooves 35 on the grief stem are opposite to. theteeth on the jaws the locking ring will continue to move downwardly bygravity until the jaws are automatically locked to the grief stem. Therecesses 53 in the locking ring receive the upper ends of the jaws whenin its lowered position and consequently the ring 48 is locked againstrotation at that time. These and other uses and advantages of theimproved automatic brief stem chuck will be clearly apparent'to thoseskilled in this art.

As a result of this invention it will be noted that an improvedautomatic chuck is provided of exceedingly simple and compact characterwhich positively locks the grief stem to the hydraulic during hydraulicfeeding of the bit, and which may be applied and released with facilityand may be readily locked in its released position in an improvedmanner. that an improved automatic grief stem chuck is provided whichmay be applied to a rotary core drilling apparatus of standardcommercial construction with a minimum of change.

While I have in this application specifically described one form whichmy invention may assume in practice it will be understood that this formof the same has been used for purposes of illustration and that theinvention may be modified and embodied in various other forms withoutdeparting from its spirit or the scope of the appended claims.

WVhat I claim as new and desire to secure by Letters Patent is:

l. A grief stem chuck for a drill feeding mechanism of the characterwherein a grief stem is employed comprising a body having means forengaging and driving a grief stem, and means for connecting a grief stemto said body including chuck jaws slidably mounted in said body, meansincluding an adjusting member surrounding and movable relative to saidbody and connected to said jaws for sliding the latter inwardly intoengagement with a grief stem and for releasing said jaws, and meansincluding a member carried by and movable relative to said adjustingmember and engageable with said body for locking said adjusting memberagainst movement relative to said body to maintain said jaws in oneposition, said locking member being releasable from said body to permitadjustment of said adjusting member relative to said body.

2. A grief stem chuck for a drill feeding mechanism of the characterwherein a grief stem is employed comprising a body havin" means forengaging and driving a grief stem, and means for connecting a grief stemto said body including chuck jaws slidably mounted in said body, meansincluding an adjust-ing member surrounding and movable relative to saidbody and connected to said jaws for sliding the latter inwardly intoengagement with grief stem and for releasing said jaws, and meansincluding a member carried by said adjusting member and engageable withsaid body and rotatable relative to said adjusting member for locking Itwill further be noted said adjusting member against movement relative tosaid body to maintain said jaws in one position, said locking memberbeing releasable by rotative movement from said body to permitadjustment of said adjusting member relative to said body.

3. A grief stem chuck for a drill feeding mechanism comprising a bodyhaving ke portions engageable with longitudinally eX- one position.

4. A grief stem chuck for a drill feeding mechanism of the characterwherein a grief stem with teeth is employed comprising a rotatable bodyhaving means for engaging and driving a grief stem, chuck jaws slidablymounted in said body, said jaws each having a series of teeth engageablewith a series of grooves in a grief stem, means including an adjustingmember surrounding said body and connected to said jaws for sliding thelatter inwardly to positively engage the grief stem and for releasingsaid jaws, and means including a member carried by said adjusting memberand movable elative thereto for'locking said j aws'in one position.

5. A grief stem chuck for a drill feeding mechanism comprising a bodyhaving key portions engageable with longitudinally extending grooves ina grief stem, chuck aws slidably mounted in said body, each of said jawshaving a series of teeth engageable with I a series of grooves in thegrief stem, means including a slidable member surrounding said body andconnected to said jaws for sliding the latter inwardly into engagementwith the grief stemand for releasing said jaws, and means-including amember carried by said adjusting member and movable relative thereto forlocking said jaws in one position.

6. A chuck for a drill feeding mechanism of the character wherein, agrief stem is employed comprising a rotatable body having means forengaging and driving a grief stem, chuck jaws slidably mounted in saidbody,.said jaws having inclined outer surfaces, means including anadjusting member surrounding said body and connected to said jaws forsliding the latter, said. adjusting member having inclined surfacesengaging the inclined surfaces on said jaws, and means including amember carried by said adjusting member and movable relative therei tofor locking said jaws in their released position.

7. A chuck for a drill feeding mechanism of the character wherein agrief stem with teeth is employed comprising a rotatable body havingmeans for engaging and driving a grief stem, chuck jaws slidably mountedin said body and each having a series of teeth engageable with a seriesof grooves in a grief stem, said jaws having inclined surfaces, meansfor actuating said jaws including an adjusting ring connected thereto,and means including a locking ring carried by said adjusting ring andmovable rela tive thereto for locking said jaws in their releasedposition.

8. A chuck for a drill feeding mechanism of the character wherein agrief stem is em ployed comprising a rotatable body having means forengaging and driving a grief stem, and means for connecting the griefstem to said chuck body including chuck jaws slidably mounted in saidbody, means for adjusting said jaws comprising an adjusting ringconnected thereto and carried by said body and connected to said jaws,and a lockin ring carried by sail adjusti ring and movable relativethereto for looking said jaws in one position.

9. A chuck for a drill feeding mechanism comprising a body, chuck jawsslidably mounted in said body, means including an adjustable member forsliding said jaws, and means incluoing a member car ied by saidadjustable member and rotatable relative thereto for locking said in oneposition, said locking means also including a pin carried by said bodywith which said locking member cooperates.

10. A chuck comprising a body, chuck jaws slidably mounted in said bodyand having inclined grooves formed therein at the sides thereof, andmeans for sliding said jaws inwardly and outwardly relative to said bodycomprising an adjusting member surrounding and movable relative to saidbody and having gib members carried thereby interlocked with the groovesin said jaws and including means carried by and movable relative to saidadjusting member for locking said adjusting member to said body tomaintain said jaws in one position, said adjusting member beingreleasible from said body to permit adjustment thereof relative to saidbody.

11. A chuck comprising a body, chuck jaws slidably mounted in said bodyhaving means for engaging and driving a grief stem, and means forconnecting a grief stem to said body including means for sliding saidjaws inwardly and outwardly relative to said body including an adjustingmember movable relative to said body and connected to said jaws, andmeans for locking said jaws in their released position including anoperator controlled member interlocked with said adjusting member androtatable relative thereto and engageable with said body, said rotatablelocking member being releasable from said body to permit adjustment ofsaid adjusting member relative to said body.

12. A chuck comprisim a body, chuck jaws slidably mounted in said body,means for sliding said jaws inwardly and outwardly including anadjustingmember connected to said jaws, and means including a member carried bysaid adjusting member and rotatable relative to the latter for lockingsaid jaws in their released position, said rotatable member beinginterlocked with said jaws when the latter are in their engagedposition.

18. A chuck comprising a body, chuck jaws slidably mounted in said body,means for moving said jaws inwardly and outwardly including an adjustingmember connected to said jaws, and means for locking said jaws inposition including a member carried by said adjusting member androtatable relative to the latter, and a locking pin carried by said bodywith which said rotatable member cooperates.

14:. A chuck comprising a body, chuck jaws slidably mounted in saidbody, means for sliding said jaws inwardly and outwardly including anadjusting member connected to said jaws, and means including a membercarried by said adjusting member and rotatable relative to the latterfor looking said jaws in position, said rotatable member having recessesreceiving said jaws when the latter are in their inward position.

15. A chuck comprising a body, chuck jaws slidably mounted in said body,means including an adjusting member connected to said jaws for movingthe latter inwardly and outwardly, and means including a member carriedby said adjusting member and rotatable relative to the latter, and acooperating pin carried by said body for looking said jaws in position,said adjusting member having a recess therein adapted to receive saidpin.

16. A grief stem chuck for a drill feeding mechanism of the characterwherein a grief stem is employed comprisin a body having means forengaging and driving a grief stem, and means for connecting a grief stemto said chuck body including radial guideways formed in said chuck body,chuck jaws slidably mounted in said body, means including an adjustingmember surrounding and movable relative to said body and connected tosaid jaws for sliding the latter in said guideways inwardly intoengagement with a grief stem and for releasing said aws, and meansincluding an operator controlled member interlocked with said adjustingmember and movable relative thereto for locking said jaws in oneposition, said latter member being releasable from said body to permitadjustment of said adjusting member and freely movable axially relativeto said body during such adjustment.

17 A grief stem chuck for a drill feeding mechanism of the characterwherein a grief stem is employed comprising a body having means forengaging and driving a grief stem and means for connecting a grief stemto said chuck body including radial guideways, formed in said chuckbody, chuck jaws slidably mounted in said guideways, an adjusting ringsurrounding said body and movable relative thereto for moving said awsin said guideways, said ring engaging said jaws and having rectangularrecesses within which said jaws project, and a locking ring carried bysaid adjusting ring and movable relative thereto for locking said adjusting ring against movementrelative to said body to maintain said jaws intheir released position, said locking ring being releasable from saidbody to permit adjustment of said adjusting ring relative to said bodyand movable freely axially relative to said body during such adjustment.

18. A grief stem chuck for a drill feeding mechanism of the characterwherein, a grief stem is employed comprising a body having means forengaging and driving a grief stem and means for connecting a grief stemto said chuck body including radial guideways, formed in said chuck,chuck jaws slidably mounted in said guideways, an adjusting ringsurrounding said body and movable relative thereto for moving said jawsin said guideways, said ring engaging said jaws and having rectangularrecesses within which said jaws project, and an operator controlledlocking ring interlocked with said adjusting ring and rotatable relativethereto for locking said adjusting ring against movement relative tosaid body to maintain said jaws in their released position, said lockingring being releasable from said body to permit adjustment of saidadjusting ring relative to said body.

19. A grief stem chuck for a drill feeding mechanism comprising a bodyhaving radial guideways, chuck jaws slidably mounted in said guideways,an adjusting ring for moving said jaws in said guideways surroundingsaid body and having rectangular recesses within which said aws project,said ring engaging said awe, and a locking ring carried by saidadjusting ring and a cooperating locking pin carried by said body andrelative to which said locking ring is movable for locking said jaws intheir released position.

20. A grief stem chuck for a drill feeding mechanism of the characterwherein a grief stem is employed comprising a body having means forengaging and driving a grief stem and means for connecting a grief stemto said chuck body including radial guideways formed in said chuck body,chuck jaws ring relative to said body and slidable rel-.

ative to said body during such adjustment.

21. A grief stem chuck for a drill feeding mechanism of the characterwherein a grief stem is employed comprising a body havmg means engaginga grief stem for pre-.

venting relative rotation therebetween and for drlving a stem, chuck awscarried thereby, and means for adjusting said jaws com-' prising anadjusting member surrounding said body and connected to said jaws andhaving a relatively rotatable grasping member carried by said adjustingmember for adjusting the latter, said rotatable member being movable byrotation relative to said adjusting member into engagement with saidbody for locking said adjusting member in one position. 1

22. A grief stem chuck for a drill feeding mechanism comprising a bodyhaving key portions engageable with a grief stem for preventing relativerotation between said body and a grief stem and for driving a stem,chuck jaws slidably mounted in said body, means for sliding said jawsinwardly and outwardly including an adjusting member connected to saidjaws, and means including a rotatable locking member carried by saidadjusting member and rotatable relative to the latter for locking thelatter in one position.

28. A grief stem chuck for a drill feeding mechanism of the characterwherein a grief stem is employed comprising a body having means forengaging and driving a grief stem and means for connecting a grief stemto said body including chuclr jaws slidably mounted in said body, amember surrounding said body and connected to said jaws for adjustingthe latter, and 'a rotatable looking member carried by and rotatablerelative to said adjusting member for locking said adjusting memberagainst movement relative to said body to maintain said jaws in oneposition, said locking member being movable freely relative to said bodywhen released therefrom to effect movement automatically of said jawsinto engagement with a grief stem. 7

24:. A grief stem chuck for a drill feeding mechanism of the characterwherein a grief 111g inclined surfaces, an adjusting ring surstem isemployed comprising a body having means for engaging and driving a griefstem, chuck jaws slidably mounted in said body, and an adjusting membersurrounding said body and connected to said jaws for sliding the latter"inwardly into engagement with a grief stem and for releasing said jaws,and an operator-controlled member carried by said adjusting member andmovable rela tive thereto for looking said adjusting member againstmovement relative to said body to maintain said jaws in one position.

In testimony whereof I aflix my signature.

HARRY C. JOHANSEN.

